Dumbarton Highway Bridge tidal current predictions
Flooding 0.1 kt now, toward SE (139°), easing. Slack at 12:57 AM, then ebb to 1.4 kt at 3:37 AM.
Now
Today, Sat, Sep 26, at 4 ft deep.
- Now
- Flood 0.1 ktToward SE (139°)
- Next slack
- 12:57 AMPDT
- Next max flood
- 1.7 kt10:35 AM
- Next max ebb
- 1.4 kt3:37 AM
Knots along the channel: above the line the flood, running in toward SE (139°); below it the ebb, running out toward NW (320°). Times are Pacific Daylight Time. Today: slack 12:57 AM, ebb 1.4 kt 3:37 AM, slack 7:10 AM, flood 1.7 kt 10:35 AM, slack 1:21 PM, ebb 1.8 kt 4:04 PM, slack 7:52 PM, flood 1.5 kt 11:00 PM.
Alerts in force
National Weather Service marine and coastal products at this station’s position.
None right now. The National Weather Service issues small craft advisories, gale and storm warnings, special marine warnings, dense fog advisories and coastal flood products for water like this.
7-day current table
Strongest flood this week 1.9 kt, Tue, Sep 29 at 12:34 PM. Strongest ebb 2.1 kt, Tue, Sep 29 at 5:43 PM.
| Time | Event | Speed | Toward |
|---|---|---|---|
| Sat, Sep 26 | |||
| 12:57 AM | Slack water | ||
| 3:37 AM | Maximum ebb | 1.4 kt | NW (320°) |
| 7:10 AM | Slack water | ||
| 10:35 AM | Maximum flood | 1.7 kt | SE (139°) |
| 1:21 PM | Slack water | ||
| 4:04 PM | Maximum ebb | 1.8 kt | NW (320°) |
| 7:52 PM | Slack water | ||
| 11:00 PM | Maximum flood | 1.5 kt | SE (139°) |
| Sun, Sep 27 | |||
| 1:49 AM | Slack water | ||
| 4:25 AM | Maximum ebb | 1.4 kt | NW (320°) |
| 7:47 AM | Slack water | ||
| 11:11 AM | Maximum flood | 1.9 kt | SE (139°) |
| 1:51 PM | Slack water | ||
| 4:33 PM | Maximum ebb | 1.9 kt | NW (320°) |
| 8:29 PM | Slack water | ||
| 11:50 PM | Maximum flood | 1.5 kt | SE (139°) |
| Mon, Sep 28 | |||
| 2:41 AM | Slack water | ||
| 5:13 AM | Maximum ebb | 1.4 kt | NW (320°) |
| 8:29 AM | Slack water | ||
| 11:51 AM | Maximum flood | 1.9 kt | SE (139°) |
| 2:26 PM | Slack water | ||
| 5:06 PM | Maximum ebb | 2.1 kt | NW (320°) |
| 9:03 PM | Slack water | ||
| Tue, Sep 29 | |||
| 12:42 AM | Maximum flood | 1.4 kt | SE (139°) |
| 3:34 AM | Slack water | ||
| 6:04 AM | Maximum ebb | 1.3 kt | NW (320°) |
| 9:15 AM | Slack water | ||
| 12:34 PM | Maximum flood | 1.9 kt | SE (139°) |
| 3:05 PM | Slack water | ||
| 5:43 PM | Maximum ebb | 2.1 kt | NW (320°) |
| 9:38 PM | Slack water | ||
| Wed, Sep 30 | |||
| 1:38 AM | Maximum flood | 1.3 kt | SE (139°) |
| 4:29 AM | Slack water | ||
| 7:00 AM | Maximum ebb | 1.1 kt | NW (320°) |
| 10:03 AM | Slack water | ||
| 1:20 PM | Maximum flood | 1.9 kt | SE (139°) |
| 3:49 PM | Slack water | ||
| 6:26 PM | Maximum ebb | 2.0 kt | NW (320°) |
| 10:21 PM | Slack water | ||
| Thu, Oct 1 | |||
| 2:40 AM | Maximum flood | 1.1 kt | SE (139°) |
| 5:30 AM | Slack water | ||
| 8:02 AM | Maximum ebb | 1.0 kt | NW (320°) |
| 10:54 AM | Slack water | ||
| 2:10 PM | Maximum flood | 1.8 kt | SE (139°) |
| 4:39 PM | Slack water | ||
| 7:14 PM | Maximum ebb | 1.8 kt | NW (320°) |
| 11:37 PM | Slack water | ||
| Fri, Oct 2 | |||
| 3:54 AM | Maximum flood | 0.9 kt | SE (139°) |
| 6:41 AM | Slack water | ||
| 9:07 AM | Maximum ebb | 0.9 kt | NW (320°) |
| 11:52 AM | Slack water | ||
| 3:02 PM | Maximum flood | 1.7 kt | SE (139°) |
| 5:34 PM | Slack water | ||
| 8:08 PM | Maximum ebb | 1.6 kt | NW (320°) |
Other depths
NOAA predicts the current at more than one depth here. This page is for the shallowest; the water deeper down turns at different times and runs at different speeds.
| Depth | Strongest flood today | Strongest ebb today |
|---|---|---|
| 4 ft | 1.7 kt 10:35 AM | 1.8 kt 4:04 PM |
| 17 ft | 1.7 kt 10:25 AM | 1.7 kt 4:01 PM |
| 40 ft | 1.5 kt 10:16 AM | 1.5 kt 3:55 PM |
What this means
The flood is the tidal current running in from the sea, the ebb the current running back out. Slack water is the short turn between them, when the current is weakest: the time to cross a strong channel, anchor, or dive. Slack in a channel is not the time of high or low tide; it can come hours after.
Speeds are knots along the channel's main axis, and directions are degrees true toward which the water flows, as NOAA prints its tables. A current against the wind stands the waves up steep and close together.
Predictions are astronomical: the moon and the sun, not the weather. Strong wind, river flow after heavy rain and storm surge all change the real current.
Nearby8
The closest other NOAA current stations, nearest first.
- Dumbarton Hwy. Bridge, 0.28 nmi. SE ofSubordinate current station
- Dumbarton Point, 1.15 nmi. SE ofSubordinate current station
- Dumbarton Point, 2.25 miles SE ofSubordinate current station
- Redwood Point, 1.7nm East ofHarmonic current station
- Redwood CreekHarmonic current station
- Redwood Pt., Blair I., 1.15 nmi. NNE ofSubordinate current station
- Little Coyote Pt., 3.1 nmi. ENE ofSubordinate current station
- San Mateo BridgeHarmonic current station
More for this place
Sources
Tidal current predictions from NOAA’s Center for Operational Oceanographic Products and Services (CO-OPS), station SFB1301, bin 12: original at NOAA. Marine alerts from the National Weather Service.